Theodor zanger



(No Model.)

T.r ZANGER. vMAGNETICI'ENDULUM LEVEL,

' No. 546,501.. F5941. Patented Sept. 1'7, `1895.

Nrrnn STATES THEODOR ZANGER, OF ERIE, PENNSYLVANIA, ASSIGNOR TO JACOB W.SEIP,

OF SAME PLACE.

MAGNETIC YPENDULUM-LEVEL.

SPECIFICATION forming part of Letters Patent No. 546,501, datedSeptember 17, 1895. Application filed October 28, 1898. Renewed June 6,1895. Serial No. 551,790. (No model.)

drawings, and to the letters of reference marked thereon, which form apart of this specification.

My invention relates to improvements in magnetic pendulum-levels; andthe object of the invention is to produce a pendulum-level that isalways reliable and will denote the eX- act degrees on anaccurately-divided dial and in such manner that the vibrations ortrembling of the pointer usually occurring with the ordinarypendulum-levels is entirely obviated or prevented; also, to accomplishthis by Very simple devices that are not liable to get out of order, butwill always accurately designate the level-line; furthermore, to attachthe weighted pendulum and the pointer on a pin or shaft, having at eachend a needlepoint, which points are journaled in corre? spondingjournals drilled into the glass front and back so as not only to makethe pointer very sensitive, but also to form a Very hard and durablebearing-surface, and, finally, to produce this magnetic pendululn-levelat a very reasonable expense.

My invention consists in the construction of certain peculiar detailsand arrangement of parts, as will be more fully described hereinafter,and speciiically pointed out in the claims, reference being had to theaccompanying drawings and the letters marked thereon.

Like letters ,indicate similar parts in both figures of the drawings, inwhich- Figure l represents a sectional elevation of my improved magneticpendulum-level. Fig. 2 is a horizontal section on the line 2 2 of Fig.1.

In the drawings, A represents the body or stock of the level, preferablymade of metal, although it may be made ot' wood or any other suitablematerial, and it may be plain or ornamental, as desired. This stock isprovided with a short cylinder or casing B, having at each end ascrew-thread to receive the heads C and D, provided with flanges toreceive lglass plates or disks E and F, and forming the pendulum G,having a convex face, is also provided with a piece of similar thinmagnetized steel g forming its face, and it is arranged as close aspossible to the projection b and its liner, so as to be attracted by it.This pendulum is secured to a pinY or short shaft h, having aneedle-point at each end, and said needle-points are journaled in smalldepressions of similar shape to receive said needlepoints. Thedepressions are drilled or ground into the glass plates E and F, thusforming very` accurate and hard bearings for the needle-points. To theshaft h the pointer or index H is secured, being, as shown, doublepointed, and if paper or equivalent dials are used it must be placed infront of them. It will be readily understood that by magnetizing thesteel liners the action of the pendulum and pointer will be very steadyand all vibrations will be entirely obviated, and levels of any kind canbe accurately ascertained and noted.

Having thus described my invention, what I claim is 1. In a magneticpendulum level the combination of a cylinder having a magnetic liner,and the glass front and back, with a shaft provided with needle-pointsjournaled in'said glass front and back, and a pendulum with magnetizedface and a pointer secured to said having magnetized face and thepointer II, shaft, all arranged as specified. all constructed andoperating as specified. Io 2. The magnetic pendulum level herein de- Intestimony whereof I affix my signature scribed, consisting of the stockA having the in presence of two Witnesses. cylinder B provided withmagnetic inner sur- THEODOR ZANGER. face, attached to it, and having aglass front XVitnesses:

and back, in which the needle-pointed shaft I. F. VVALLIIER, 7L isjouinaled, and carrying the pendulum G T. C. BRECHT.

